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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I believe there is no "red line" appearing on your tach guage because its controlled electronically. When you get to the highest safe revs, the computer will not let you go any higher. I have no idea what that rpm figure is. Maybe someone else on this forum knows.
I think it depends on your engine. I wanted to see where mine was in my dakota, so i hauled a** and didn't let it shift until i was ready (Auto Tranny shifted manually) I have the 3.9L V6 and i think the computer governed out at about 5.5-6 grand.